Magnetic power unit power take-off



2 sheets-sneer 1 w;V l. MORRISON, JR uAGNE'rIc POWER UNIT vPOWER TAKLOFFMarch 27, l'1951 Filed Sept. i2l, 1949 Z/ -Jl nventor [VILLA/F0 L.MORE/50N JR.

Gtfornegs March 27, 1951 w. l. MORRISON, JR

MAGNETIC POWER UNIT. POWER TAKE-GFF l 2 Sheets-Sheet 2 Filed Sept. 2l,1949 v nventor WILL/4R0 L. HORN/50N JA.

Gttornegs Patented Mar. 27, 1951 UNITED STATES PATENT OFFICE 26465949MAGNETIC' POWER UNIT` POWER TAKE-OFF Willard L. Morrison,Jr., Akron,Ohio, assigner to MagneticV Power, Inc., Wilii'ington Dell,- acorporation of Delaware Application September 21, 1949,SerialNo'.'116,912A

6 Claims. l The present invention relatesV to magnetic power units andparticularly power take-ois' therefor.

A purpose' of the invention is to increaseV the speed of power drivingfrom a magnetic power unit to a magnet keeper without creating a con'dition of unbalance in the power take-off.

A further purposeV is to'derive power on the same axis as the keeper ata much greater speed than that o'f the keeper.

A further'purpos'e is to obtain a fully symmetri-V cal power takeoffwhich will not create an offce'nter tor'qu'e distribution and thereforewill not tend to displace the power' takeeoi to one' side due tothemagnetic force;

Further purposes' appear in the specification andin the claims.

In the drawings I have chosen to illustrate one only of the numerousembodiments in which my invention may appear, selecting the forms shownfrom the standponts ofv convenience" in illustration, satisfactoryoperation and-clear'demo'nstration of the' principles involved;

'Figure l isa side elevation of a` magnetic power unit andpower't'ake-oiaccording' tothe invention. Y Figure 2 is an enlargedfragmentary side ele'- vation partly in central vertical section.

Figure 3 is a top plan- View of the power' takeoff`- unit with the'mixer removed.

F`i` g ure 4 is a section of Figure 2 on the line gears. Theplanetaryears externally interme'sh with a ring gear'. The question ofwhether the ring gear andV planetsintermesh: as internal and external;gears, bevel gears or end andi crown gears is not criticaltothepresentinvention, although in the preferred embodiment shownthe gears arerelatedv as internal and external gears. The ring gear isv suitablymounted-on a housing', anddesirably' functions as a/ stationary g'ear.-

Power istaken offY on a1 driven gear which is desirably coaxial with thekeeper andA externally internieshes with the'Vv planetary gears.

It4 will' bey evident that by' procedure" an extremely compact device isproduced which has close4 coupling'with-the driving magnet and has aminimum of height or aXial extent; At the same tirriethe'v forces ofvthe keeper and of the ultimate shaft or driven member are coaxial so'that there i'sno nonsymmetrical force distribue tion which'would' tendtodispla'ce the magnetic power take-on from the'v powerv unit.

It will,V of course; be evidffnt"v that if ne'c'es'ary thel magneticpowerv take-oft can' bei clampedoiotherwise fastened to prevent rotationof its housing'. Y

The magnetic power unitof theinv'ention corn'-V prises a base" housing20 supporting a vertical electric motor 2f controlled by a switch- 22`and cut off by a switchV 23 The-motor 2f! is connect'- ed by gearing24'fwith a rotor shaft 2liv turningv in a bottombe'arin'g 26Min thehousing and in a;

4' 4 Y top bearingZl on the underside of thetfop of a In the drawingslike numerals' refer to like non-maenetickcasi'ne V28' surrounding therotor parta-, A and supportedon' the bottomfhousin'g. The rotor Magneticpower units, asV shown for' example in Jerome L. Murray U. S. patentapplication Seial'No. 771,176, led' August 29, 1947, for'MiX- erandProcessor for Home Use and the Like, have' been developed for mixingand stirring and: to

shaft 25 has threads 30 in the' directionwhicli will raise the 'rotor'when thelshaft turns forward` lyand the'threa'ds 3U engage and freelyrun with the threads on 4nut 3|' surroundin'gthe rotor' shaft.The-nut`3l interconnectswithtne rotor operate household appliances: ubasel 3 2 preferably'V off"magneticallyv susceptible For' manyapplications it isdesirable to obtain material WhCh SUDPOItS upwardly'directed D81"- rniich higher speeds' than those readily produced manentInagnetsA 33; Att 110D' 0f theA IOto'l" a" by the' magnetic power' unititself. For example, nonmagneti'e plate 345 having anv4 opening towhereas the magnetic power unit may operate at clear` thej topv bearingv2-1; supportsV the magnets aspeed of the order of 1000 R; P. M., forhome 45 andis held tothe rotor basebY Studs 352v TheV honiogeniaersl andblenders, it is frequently derotor is' limitedfin upward motion by ajcollar"3 sirable' to obtainV speeds of the order of 10,000 on the rotorshaft engaging nut 3ll and isf-limited R. P. M. in downward motion byrotor" base 32 engaging Pivotally mounted on the keeper is oneV orcut-off switch 23 against the action of? switch preferably twooppositely disposed planetary 50 compression spring? 31'; When A`4 the:`rotor' lil' upper position it creates a turning magnetic field closecoupled to the keeper. When therotor is in the lower position the keepercan be readily removed.

It will be understood that any suitable magnetic power unit creating aturning magnet eld may be used.

Resting on the casing 28 is a suitably nonmagnetic power take-offhousing 38 conveniently separable at 4|) and joined by screws 4l. At thebottom the take-ofi housing is closed by a nonmagnetic Wall 42 closecoupled to the top of the power unit casing, and joined .to the rest ofthe power take-off housing by screws 43. Close coupled with the bottomwall 42 is a rotatable mag-l netically susceptible keeper 44, which isrotatably mounted on a bearing'45 supported by the collar 52 on thebottom wall of the power takeoff housing. Intermediate between the `axisand the housing of the` keeper, at one and preferably at diametricallyopposite points, are planet gear shafts 4B supporting planet gears 41which intermesh at the outside with an internal ring gear 48 desirablyheld by locking it between the separable parts of the power take-offhousing. The planets at the inside intermesh with a driven pinion whichis secured on a shaft 5l journalled at 52 coaxially with the bearing 45,the bearing 52 of the shaft 5| being supported by a stationary collar52' united as by spot-welding tothe bottom wall of the power take-offcasing inside the bearing 45. The shaft 5| is journalled at its upperend in a second bearing '53 and is provided with a square end 54 at thetop for interconnection with a unit to be driven.

Where the power take-on is used for homogenizing purposes as in ablender, the power take-off casing is desirably provided with upstandinglugs 55 which interlock at 56 to prevent rotation at the bottom of ahomogenizer jar 51 having a shaft 58 provided with a square socket 60 toengage the square end 54 on the shaft 5I and journalled at 6lv in thecenter of the bottom of the jar 5l. A suitable beater or impeller 62 isprovided on the shaft 58.

I In operation, in order to employ the device the magnetic powertake-off casing will be mounted on top ofthe magnetic power unit, withthe keeper preferably substantially coaxial with the magnet and thecoupling between the magnet andthe keeper reduced to a minimum.

Turning the magnet will cause the keeper to turn, and turning the keeperwill cause the planetary gears to turn inside the ring gear, thusresulting in turning the driven gear which is coaxial with the keeper.The keeper and its planetary gears are supported by the bearing fromabove, so that the bearing does not interfere with close couplingbetween the keeper and the magnet and also so that the magnetic forcescan provide slight adjustment of the axis of the keeper within thelimits of .play of the bearing.

While reference has been made herein to a permanent magnet or magnetssupported on a rotor for creating the turning magnetic field, questionsof whether the magnetic driving eld is created by a permanent magnet, anelectromagnet or some combination of the same, or by magnets on a rotoror a magnet which lforms vthe entire rotor are not critical in thepresent invention, and it will be understood that variations in thesefeatures may be employed if desired.

In view of my invention and disclosure variations and modifications to`meet individual whim or particular need will doubtless become evident 4to others skilled in the art, to obtain all or part of the benets of myinvention without copying the structure shown, and I, therefore, claimall such insofar as they fall within the reasonable spirit and scope ofmy claims.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is:

1. In a magnetic power device, a power unit including a turning magnet,a magnet keeper pivotally mounted and turning with the magnet, astationary ring gear, coaxial with the keeper, a planetary gear insidethe ring gear intergeared With the ring gear and pivotally mounted onthe keeper on an axis radially displaced from the axis of the keeper,and a driven gear on the axis of the keeper inside the planetary gearand intergeared therewith on the same teeth which intergear with thering gear.

2. A magnetic power take-olf unit comprising a housing, a magnet keeperrotatably mounted in the housing, a stationary ring gear on the housingcoaxial with the keeper, a planetary gear pivotally mounted on thekeeper on an axis radially displaced from the axis ofthe keeper andexternally intermeshed with the ring gear, a driven gear coaxial withthe keeper externally intergeared with the planetary gear on the sameteeth which intergear with the ring gear and a driven member connectedto the driven gear.

3. In a power take-off for a magnetic power unit, a housing, a Verticalshaft in the housing, a bearing in the housing rotatably supporting theupper end of the vertical shaft, a magnet keeper rotatably supported onthe lower end of the shaft and adapted to turn in the housing, aninternal stationary ring gear on the inside of the housing coaxial withthe keeper and above the same, a planetary Igear pivotally mounted onthe keeper intermediate between the axis and the outside of the keeperand vexternally intergeared with the ring gear on the same teeth whichintergear with the ring gear, a driven member rotatably mounted at theaxis of the keeper above the same and a driven gear on the driven memberexternally meshing with the planetary gear.

` 4. In a power take-off unit, a housing, a vertical bearing in thehousing, a vertical shaft in theV bearing extending below the same, amagnet keeper vrotatably mounted at the lower end of the vertical shaft,a stationary internal ring gear on the housing above the keeper, a pairof oppositely disposed planet gears pivotally mounted on the keeper onan axis radially displaced from the axis of the keeper and externallyintermeshingv lwith the ring gear on the same teeth which intergear withthe ring gear, a driven gear coaxial with the keeper intermeshing withboth planet gears and a driven member turned by the driven gear.

5. In a magnetic power device, a power unit including a turning magnet,a magnet keeper pivotally mounted and turning with the magnet, a finaltake-orf shaft coaxial with the keeper, a stationary ring gear coaxialwith the keeper, a planetary gear inside the ring gear intergeared withthe ring gear and pivotally mounted on the keeper on an axis radiallydisplaced from the axis of the keeper and a driven gear on the iinaltake-off shaft inside the planetary gear inter'- geared with the ringgear, the driven gear turning relatively with respect to the ring gear.

6. In a magnetic power device, a power unit housing including a turningmagnet, a power take-,oir housing separablefrom the power unit housing,a magnet keeper pivotally mounted in the power take-or housing andturning with the magnet, a stationary ring gear coaxial with the keepermounted on the power take-off housing, a planetary gear inside the ringgear intergeared with the ring gear and pivotally mounted on the keeje'ron an axis radially displaced from the axis of the keeper, a driven gearon the axis of the keeper inside the planetary gear and intergearedtherewith on the same teeth which intergear with the ring gear and afinal power take-ofi` shaft 10 Number journaled in the power take-offhousing and carrying the driven gear.

WILLARD L. MORRISON, JR.

REFERENCES CITED fie following references are of record in the file ofthis patent:

FCDREIGN PATENTS Country Date 9,111 Great Britain of 1902

